We created Blippit Boards to give schools x-ray vision from a subject leadership perspective. Knowing and understanding 'what's up' on display anywhere at any given time is a nice position to be in.
You already take photos of displays and put them somewhere safe don't you? That's what you do with Blippit Boards too but with some very useful extra bells on like 'tags'. Ask some willing colleagues to try out Blippit Boards with you free for 40 days to see how quickly the whole-school picture builds up in the DashBoard to support your subject monitoring?